[chaley]

Originally Posted by ownedbycats

@chaley - After updating Calibre to source, has_data() broke with this error:

EXCEPTION: Error in function evaluate on line 4 : AttributeError - 'Cache' object has no attribute 'list_extra_files_matching'

What changed?

EDIT: Maybe this change https://github.com/kovidgoyal/calibr...095525b6e24e92

Yes, because of that commit. The API was improved for this use case, making it faster.

The template should be:

python:
def evaluate(book, context):
	db = context.db.new_api
	files = db.list_extra_files(book.id, pattern='data/**/*', use_cache=True)
	return 'Yes' if files else ''

Note: I will be adding template functions for queries about extra files.